On 2019/2/28 下午9:51, David Sterba wrote: > On Thu, Feb 28, 2019 at 06:02:53PM +0800, Qu Wenruo wrote: >> 2) No way to distinguish between different btrfs filesystems >> Due to the fact that we can't get fs_info easily from extent_io_tree, >> there is no way to distinguish events from different fses. >> To avoid extra noise, please ensure there is only one btrfs in your >> test environment. > > The id of the filesystem is IMO important for tracepoints, I think we > can live with the 8 bytes of fs_info pointer in extent_io_tree. That's my original concern about the extra 8 bytes. But since you're OK with that, I'm completely fine adding fs_info into them. Thanks, Qu
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